It covers an area of approximately 2,000 square meters. This is a large, complex pentalobate nuraghe, featuring an outer wall (antemurale) that enclosed the huts of the village, which developed in several phases around the central monument.
The historian Angius considered it and listed it among the largest known nuraghi in Sardinia.
It was officially declared an Archaeological Cultural Heritage Site on January 15, 2015, by decree of the Superintendence.
Not far from Nuraxi Fenu lies Sena e su Zimini, a settlement with an adjoining Nuragic tomb, recognizable by the presence of well-worked basalt blocks in a trapezoidal shape, shaped with a bush hammer. This is believed to be a collective megalithic tomb, as indicated by the large quantity of human bones recently unearthed there.
Since 2018, these sites have been part of the Pabillonis Archaeological Park..